about the concentration camps there and the oh lit cal prisons where three generations of a family can be imprisoned for so called political crimes and how the regime uses food as a weapon for ordinary people just to keep them in line and control them. >> greta: how do they know it is even better outside north korea to even go there? that is what i never understood. they are there and don't know figure. how do they know to go anyplace? >> this is something else that s happening thanks to the people who have escaped. think about it. if you are an immigrant to any country the first thing you want to do is let your family and friends know that how you are doing in your new home and what things are like there and so, too, the few north koreas who have gotten out are finding ways to get information back to north korea. you can't send a letter. you can't make an ordinary phone call. you can't sent a text message or an e-mail so what do they do? they hire cor couriers who walk into north korea and hand deliver, carry verbal messages to their families. the chinese courier will knock on a door